Windows: If you find yourself leaving your flash drive in your work computer and cursing yourself after you arrive home, USB Guard will make sure you always remember to take your flash drive with you.

USB Guard is completely portable, so you don't need to install anything to run it. Just start it up and it sits in your system tray and monitors the external drives plugged into your machine (you can set it to monitor specific drives if you so choose, too). If you go to shut down your computer and one of those drives is still plugged in, it'll show a prompt, reminding you to unplug it before you leave. That way, you'll always have it with you, wherever you go.